[ubuntu] OpenVPN disconnects

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http://ubuntuforums.org – OS Ubuntu 12.04 32-bit with the latest fixes to date. I've long had this VPN set up. It had been working flawlessly until about a week ago when it started to unexpectedly disconnect. I use Unity and NetworkManager. I click on NM -> VPN Connections -> <VPN Connection Name> and it connects without fail every time. However, 120 seconds in the connection ping stops responding from the other end (ann all other type of traffic thrhough this VPN channel stops). After another 120 seconds the connection is dropped. The exact same config works flawlessly on a Windows box. Here's the conf (Hardware)